(19)
(11) EP 1 442 906 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.12.2005 Bulletin 2005/52

(43) Date of publication A2:
04.08.2004 Bulletin 2004/32

(21) Application number: 04002226.1

(22) Date of filing: 02.02.2004
(51) International Patent Classification (IPC)7: B60H 1/32
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 03.02.2003 JP 2003026035

(71) Applicant: Calsonic Kansei Corporation
Tokyo 164-8602 (JP)

(72) Inventors:
  • Okawara, Yasuhito
    Nakano-ku Tokyo 164-8602 (JP)
  • Yajima, Toshio
    Nakano-ku Tokyo 164-8602 (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)

   


(54) Air conditioning apparatus using supercritical refrigerant for vehicle


(57) An air conditioning apparatus includes a refrigerating cycle supplying the supercritical refrigerant pressurized by the variable displacement compressor (16) to the outdoor heat exchanger (3), the expansion valve (4) and the indoor heat exchanger (5), in sequence and subsequently return the supercritical refrigerant to the variable displacement compressor. The apparatus further includes a displacement control unit that establishes a limit value derived from the engine speed and further controls a discharge volume of the compressor prior to the control in the opening degree of the expansion valve, on a basis of the so-established limit value.






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